One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,6)(3,8,7,4)(9,10)(11,15)(12,14)(13,16)(18,22)(20,23)(27,31)(29,32)(1,3)(2,4)(5,7)(6,8)(9,10,12,14)(11,13,16,15)(17,18,21,22)(19,23,24,20)(2,6)(3,7)(9,10,12,14)(11,13,16,15)(17,19,21,24)(18,20,22,23)(25,26,28,30)(27,29,31,32)(1,2)(3,8)(4,7)(5,6)(9,10)(11,13)(12,14)(15,16)(17,19)(18,23)(20,22)(21,24)(25,27)(26,29)(28,31)(30,32) involution — undirected(1,4,5,8)(2,7,6,3)(9,11,12,16)(10,13,14,15)(17,20,21,23)(18,19,22,24)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.